Connection Procedure Of Power Circuit Wiring; Braking Resistor; Dc Input - Toshiba TOSVERT VF-AS3 Instruction Manual

For details of the peripheral devices, refer to [Chapter 10].
• An noise filter is built in all the types as standard.
• A DC reactor is built in as standard or attached (frame size A7, A8).

Braking resistor

• To VFAS3-2004P to 2370P, VFAS3-4004PC to 4750PC, and VFAS3-4160KPC, connect only the
braking resistor (optional) because a dynamic braking circuit is built in them as standard.
• When a braking resistor (optional) is installed for VFAS3-4900PC to 4132KPC and VFAS3-
4200KPC to 4280KPC, a braking unit (optional) is also required.
For details, refer to [10. 3. 4].
2

DC input

• To input DC power, connect the inverter between terminals [PA/+] and [PC/-].
• When the inverter is used with a DC power supply, a circuit to suppress an inrush current may be
required. Please contact your Toshiba distributor for information.
• When the inverter is used with a DC power supply, three-phase power input for cooling fan driving
may be required separately.

■ Connection procedure of power circuit wiring

The following is the connection procedure of the power connection, with frame size A1 as an exam-
ple.
Connect other sizes in the same way.
1 Remove the front cover.
For how to remove, refer to [2. 2. 1].
2 Loosen the screws of the grounding terminal for inverter case. Mount the grounding wire to the
9
screws of grounding terminal. Switch the grounding capacitor when needed. For details of how
to switch, refer to [2. 3. 4].
3 Loosen the screws of the terminals [U/T1], [V/T2], and [W/T3] and a terminal [PE] of the power
terminal block.
The terminal [PE] exists only in frame size A4 to A6.
2. Installation and wiring
2-24
E6582062
Loosen screws (x4)
Cable clamp